Manufacturing container or tube from paper; or other manufacturi – Control means energized in response to activator stimulated... – Responsive to work material – the product or means engaging...
Patent
1995-01-05
1997-05-13
Hail, III, Joseph J.
Manufacturing container or tube from paper; or other manufacturi
Control means energized in response to activator stimulated...
Responsive to work material, the product or means engaging...
463 23, 463417, B31B 102, B65H 4512, B65H 4518
Patent
active
056287186
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a method of operating a folder comprising a plurality of sequentially arranged folder units, of which at least one is provided with a sheet detector arranged upstream of a sheet abutment and at least one lateral guide, in which automatic and single stroke modes of operation are provided for.
BACKGROUND OF THE INVENTION
In a folder the sheet abutments and guides must be set to the size of the respective sheet to be folder at the start of a run. The setting up of a new run is, however, a very slow process. Depending upon the speed of the conveyor tapes, the controller of the folder must determine when the conveying means must be switched off (i.e., at an earlier or later point in time) if the sheets being supplied to the folder are to come to rest at the correct position underneath the chopper in order to perform adjustment of the abutments and guides.
SUMMARY OF THE INVENTION
One object of the invention is to provide a method of operating a folder of the type initially mentioned by which the setting of the sheet guides is simplified.
This aim is to be achieved in accordance with the invention by the provision of a further mode of operation for setting up the machine in a "make-ready" mode, in which: speed range, signal for the drive so that the sheet is retarded short of the guide of the respective folder unit and comes to rest; abutment of the respective folder unit; and arrives at the sheet abutment, the guide is set to suit the size and folding requirements of the supplied sheet.
The invention is applicable to folders having chopper or knife-folding units as well as to folders having buckle (or buckle-plate) folding units, and more particularly to combination folders (i.e., "combination folders" are folders having in combination both knife-folding units and buckle plate-folding units) having knife-folding units for forming right-angled folds, three-directional folds and four-directional folds, and to buckle folders having folding units for forming right-angled folds, three-directional folds, and four-directional folds, respectively.
The European patent publication 0 131 310 A discloses a prior art folder with chopper folder (i.e., knife-folder) units, which possesses a sheet detector that registers the passage of a sheet to be folded that is located on the conveyor tapes. The distance of the sheet detector from the abutment is made such that a sheet ready to be folded at the abutment is no longer in the working range of the sheet detector. A controller for the drive of the conveyor tapes stops this drive if an approaching sheet detected by the sheet detector has not left the working range of the sheet detector after a set time has elapsed after the first instant of sheet detection. In accordance with the method of the invention the same sheet detector may be employed to produce a switch off signal to the drive in the "make-ready" mode of operation.
In the case of another prior art folder in accordance with the German patent publication 3,935,056 A, the individual buckle-plate folder units possess different associated sheet detectors. Such a folder (as well a folder using the method of the present invention) can be utilized in which the signals of the sheet detectors can be used as "switch off" signals for the "make-ready" or "set up" mode of operation.
Advantageous further developments of the invention include manually powering the folder at a further reduced speed, thereby causing the movement of the sheet toward the sheet abutment. In addition, this movement of the sheet toward the sheet abutment can be caused, at a much reduced speed, by repeated short-time operations of a switch for the temporary operation of the drive of the folder. Furthermore, in certain folder units, a "make-ready" or "set-up" mode of operation is individually provided using a single stroke mode of operation. After selection of the single stroke mode of operation has occurred, the make-ready mode of operation is available, which involves the take up of a sheet from a sheet delivery
REFERENCES:
patent: 3176977 (1965-04-01), Graf
patent: 4085928 (1978-04-01), Sussman
patent: 4175740 (1979-11-01), Klenk
patent: 4338086 (1982-07-01), Heater
patent: 4419088 (1983-12-01), Nemec
patent: 4425110 (1984-01-01), Gruger
patent: 4481007 (1984-11-01), Hornung
patent: 4496337 (1985-01-01), Meenen
patent: 4573671 (1986-03-01), Reponty
patent: 4578052 (1986-03-01), Engel
patent: 4746108 (1988-05-01), Hirayama
Folding in Practice, Alfred Furler, 1983, pp. 40-44.
Day Christopher W.
Hail III Joseph J.
Stahl Gmbh & Co. Maschinenfabrik
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